CVE-2023-30936
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIn telephony service, there is a missing permission check. This could lead to local information disclosure with no additional execution privileges needed.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA missing permission check in the Android telephony service allows local attackers to access sensitive telephony information (such as call logs, SIM status, or network details) without requiring elevated privileges. The vulnerability stems from an unprotected IPC interface or service method that should enforce runtime permissions but does not.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 10.0= 11.0= 12.0= 13.0CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify Android versionGo to Settings > About Phone > Android version, or run 'getprop ro.build.version.release' via ADB shellAffected if The device runs Android 10, 11, 12, or 13 (any subversion)
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Identify apps with telephony permissionsRun 'dumpsys package | grep -E "(READ_PHONE_STATE|READ_CALL_LOG|READ_SMS)"' via ADB shell to list granted telephony permissionsAffected if Any third-party app holds READ_PHONE_STATE, READ_CALL_LOG, or READ_SMS permission without clear user intent or need
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Review telephony service access logsRun 'logcat -d | grep -i "TelecomService" | grep -i "permission"' via ADB shell to check for permission-related messagesAffected if Logs show Telephony service calls that lack proper permission verification or show DENIED messages for legitimate attempts while suspicious ALLOWED messages exist
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Check for apps with unusual telephony behaviorRun 'dumpsys activity service TelecomService' via ADB shell to inspect active service connections and callersAffected if Unknown or untrusted apps appear connected to TelecomService without appropriate permission grants
A user is affected if their device runs Android 10-13 AND has any third-party application with telephony permissions that could exploit the unprotected IPC interface to access call logs, SIM status, or network details without proper authorization.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataImplement proper permission checks (e.g., READ_PHONE_STATE or corresponding runtime permissions) on all telephony service interfaces that handle sensitive data. Validate caller identity and enforce Android permission framework requirements.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-30936 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-30936 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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